The Republican presumptive nominee said "Look, I'm building a wall, okay? . . . I'm trying to keep business out of Mexico . . . he's of Mexican heritage and he's very proud of it as I am where I come from."

Many Republican leaders say this was not a smart play. In response to these comments, Senator Mich McConnell said, "This is a man who was born in Indiana. All of us came here from somewhere else."

But Trump believes ethnicity could affect his case's outcome.

When asked if his proposal to ban Muslims from entering the U.S. would affect a Muslim judge's opinion, Trump said he believes a Muslim judge might also be biased against him

At the same time, there's this Trump tweet, about the death of Muhammad Ali. In which he calls the Muslim boxing legend a "truly great champion and a wonderful guy."

Muhammad Ali is dead at 74! A truly great champion and a wonderful guy. He will be missed by all!